Rosamond Water Hardness & Quality Report (2026)
Water Hardness
8.2 grains per gallon
Source
mixed
pH Level
8
neutral = 7.0
Lead
0.006 mg/L
✓ Below action level
TDS
390 mg/L
Est. Daily Cost
$0.37
energy & soap waste
Source: USGS Water Quality Portal · Updated 2026
0–60
mg/L
Soft
61–120
mg/L
Moderately Hard
121–180
mg/L
Hard
180+
mg/L
Very Hard
Appliance Damage Report
In Rosamond, your appliances are currently losing 19% efficiency due to mineral buildup.
| Appliance | In Rosamond | Soft Water City | Efficiency Loss |
|---|---|---|---|
| Kettle | 5 yrs | 8.5 yrs | -41% |
| Washing Machine | 8.4 yrs | 12 yrs | -30% |
| Water Heater | 10 yrs | 15 yrs | -33% |
Regional Water Comparison
How Rosamond compares to its nearest neighbours
| City | Hardness | PFAS (ppt) | Risk | Source |
|---|---|---|---|---|
| ▶ Rosamond, California | 140 mg/L | 5.9 ppt | 🟠 Hard | mixed |
| Lancaster, California | 103.5 mg/L | 4.9 ppt | 🟡 Moderately Hard | mixed |
| Palmdale, California | 121 mg/L | 5.4 ppt | 🟠 Hard | mixed |
| California City, California | 189.5 mg/L | 7.4 ppt | 🔴 Very Hard | mixed |
| Vincent, California | 116 mg/L | 5.2 ppt | 🟡 Moderately Hard | mixed |
National Benchmark
How Rosamond compares to the USA average
| Benchmark | Hardness | Appliance Risk |
|---|---|---|
| ▶ Rosamond | 140 mg/L | 🟠 Moderate |
| USA National Avg | 150 mg/L | 🟠 Moderate |
| Badger Top Rated | 8.5 mg/L | 🟢 None |
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What Makes Rosamond's Water Unique?
Local geology and source profile
Rosamond, California, in Kern County — an unincorporated Kern County community adjacent to California City and Lancaster in the Antelope Valley of the western Mojave Desert, home of the Kern County Airport and near Edwards Air Force Base — receives its municipal water from the Rosamond Community Services District, drawing from the State Water Project (California Aqueduct, Kern County) and local Antelope Valley groundwater wells.
The moderately hard 140 mg/L hardness and TDS of 390 mg/L reflect the Antelope Valley's blend of soft SWP water (Sierra Nevada origin — low hardness) and harder desert aquifer groundwater. The Antelope Valley aquifer in Kern County is developed in Quaternary alluvial fan deposits from the Tehachapi Mountains and the San Gabriel Mountains — calcareous desert alluvium with caliche (calcium carbonate hardpan) contributing significantly to groundwater hardness. The mixing ratio of soft SWP and hard Antelope Valley groundwater determines the final Rosamond supply hardness.
At 140 mg/L, Rosamond's water is moderately hard — scale builds in kettles and appliances over months, dishwashers benefit from rinse aid, and bathroom fixtures develop calcium deposits. Quarterly descaling is appropriate. The PFAS level of 5.9 ppt warrants a certified drinking water filter — Edwards Air Force Base (Kern County — major AFFF source in the Mojave Desert-Antelope Valley watershed), the California Aqueduct PFAS corridor, and the Antelope Valley PFAS background contribute to Rosamond's elevated readings.
Geology & Source: Rosamond in Kern County draws from the Rosamond Community Services District on State Water Project (California Aqueduct, Kern County) and Antelope Valley groundwater wells — the SWP Sierra Nevada supply and the Mojave Desert alluvium (caliche calcareous) — California SWP-Mojave Desert blended supply produces moderately hard water at 140 mg/L with TDS 390 mg/L in this Kern County California community.